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Commit | Line | Data |
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ef53dae8 SR |
1 | /* |
2 | * Helper macros to support writing architecture specific | |
3 | * linker scripts. | |
4 | * | |
5 | * A minimal linker scripts has following content: | |
6 | * [This is a sample, architectures may have special requiriements] | |
7 | * | |
8 | * OUTPUT_FORMAT(...) | |
9 | * OUTPUT_ARCH(...) | |
10 | * ENTRY(...) | |
11 | * SECTIONS | |
12 | * { | |
13 | * . = START; | |
14 | * __init_begin = .; | |
7923f90f | 15 | * HEAD_TEXT_SECTION |
ef53dae8 SR |
16 | * INIT_TEXT_SECTION(PAGE_SIZE) |
17 | * INIT_DATA_SECTION(...) | |
0415b00d | 18 | * PERCPU_SECTION(CACHELINE_SIZE) |
ef53dae8 SR |
19 | * __init_end = .; |
20 | * | |
21 | * _stext = .; | |
22 | * TEXT_SECTION = 0 | |
23 | * _etext = .; | |
24 | * | |
25 | * _sdata = .; | |
26 | * RO_DATA_SECTION(PAGE_SIZE) | |
27 | * RW_DATA_SECTION(...) | |
28 | * _edata = .; | |
29 | * | |
30 | * EXCEPTION_TABLE(...) | |
31 | * NOTES | |
32 | * | |
04e448d9 | 33 | * BSS_SECTION(0, 0, 0) |
ef53dae8 SR |
34 | * _end = .; |
35 | * | |
ef53dae8 SR |
36 | * STABS_DEBUG |
37 | * DWARF_DEBUG | |
023bf6f1 TH |
38 | * |
39 | * DISCARDS // must be the last | |
ef53dae8 SR |
40 | * } |
41 | * | |
42 | * [__init_begin, __init_end] is the init section that may be freed after init | |
562c85ca YW |
43 | * // __init_begin and __init_end should be page aligned, so that we can |
44 | * // free the whole .init memory | |
ef53dae8 SR |
45 | * [_stext, _etext] is the text section |
46 | * [_sdata, _edata] is the data section | |
47 | * | |
48 | * Some of the included output section have their own set of constants. | |
49 | * Examples are: [__initramfs_start, __initramfs_end] for initramfs and | |
50 | * [__nosave_begin, __nosave_end] for the nosave data | |
51 | */ | |
c80d471a | 52 | |
1da177e4 LT |
53 | #ifndef LOAD_OFFSET |
54 | #define LOAD_OFFSET 0 | |
55 | #endif | |
56 | ||
b92021b0 | 57 | #include <linux/export.h> |
1da177e4 | 58 | |
6d30e3a8 SR |
59 | /* Align . to a 8 byte boundary equals to maximum function alignment. */ |
60 | #define ALIGN_FUNCTION() . = ALIGN(8) | |
61 | ||
07fca0e5 SR |
62 | /* |
63 | * Align to a 32 byte boundary equal to the | |
64 | * alignment gcc 4.5 uses for a struct | |
65 | */ | |
aab94339 DB |
66 | #define STRUCT_ALIGNMENT 32 |
67 | #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) | |
07fca0e5 | 68 | |
eb8f6890 SR |
69 | /* The actual configuration determine if the init/exit sections |
70 | * are handled as text/data or they can be discarded (which | |
71 | * often happens at runtime) | |
72 | */ | |
eb8f6890 SR |
73 | #ifdef CONFIG_HOTPLUG_CPU |
74 | #define CPU_KEEP(sec) *(.cpu##sec) | |
75 | #define CPU_DISCARD(sec) | |
76 | #else | |
77 | #define CPU_KEEP(sec) | |
78 | #define CPU_DISCARD(sec) *(.cpu##sec) | |
79 | #endif | |
80 | ||
1a3fb6d4 | 81 | #if defined(CONFIG_MEMORY_HOTPLUG) |
eb8f6890 SR |
82 | #define MEM_KEEP(sec) *(.mem##sec) |
83 | #define MEM_DISCARD(sec) | |
84 | #else | |
85 | #define MEM_KEEP(sec) | |
86 | #define MEM_DISCARD(sec) *(.mem##sec) | |
87 | #endif | |
88 | ||
8da3821b | 89 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
4b3b4c5e JR |
90 | #define MCOUNT_REC() . = ALIGN(8); \ |
91 | VMLINUX_SYMBOL(__start_mcount_loc) = .; \ | |
8da3821b SR |
92 | *(__mcount_loc) \ |
93 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; | |
94 | #else | |
95 | #define MCOUNT_REC() | |
96 | #endif | |
eb8f6890 | 97 | |
2ed84eeb | 98 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
45b79749 SR |
99 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
100 | *(_ftrace_annotated_branch) \ | |
101 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; | |
1f0d69a9 SR |
102 | #else |
103 | #define LIKELY_PROFILE() | |
104 | #endif | |
105 | ||
2bcd521a SR |
106 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
107 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ | |
108 | *(_ftrace_branch) \ | |
109 | VMLINUX_SYMBOL(__stop_branch_profile) = .; | |
110 | #else | |
111 | #define BRANCH_PROFILE() | |
112 | #endif | |
113 | ||
376e2424 | 114 | #ifdef CONFIG_KPROBES |
69902c71 VG |
115 | #define KPROBE_BLACKLIST() . = ALIGN(8); \ |
116 | VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \ | |
376e2424 MH |
117 | *(_kprobe_blacklist) \ |
118 | VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .; | |
119 | #else | |
120 | #define KPROBE_BLACKLIST() | |
121 | #endif | |
122 | ||
5f77a88b | 123 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e SR |
124 | #define FTRACE_EVENTS() . = ALIGN(8); \ |
125 | VMLINUX_SYMBOL(__start_ftrace_events) = .; \ | |
b77e38aa SR |
126 | *(_ftrace_events) \ |
127 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; | |
128 | #else | |
129 | #define FTRACE_EVENTS() | |
130 | #endif | |
131 | ||
1ba28e02 LJ |
132 | #ifdef CONFIG_TRACING |
133 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ | |
134 | *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ | |
135 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; | |
102c9323 SRRH |
136 | #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \ |
137 | *(__tracepoint_str) /* Trace_printk fmt' pointer */ \ | |
138 | VMLINUX_SYMBOL(__stop___tracepoint_str) = .; | |
1ba28e02 LJ |
139 | #else |
140 | #define TRACE_PRINTKS() | |
102c9323 | 141 | #define TRACEPOINT_STR() |
1ba28e02 LJ |
142 | #endif |
143 | ||
bed1ffca | 144 | #ifdef CONFIG_FTRACE_SYSCALLS |
3d56e331 SR |
145 | #define TRACE_SYSCALLS() . = ALIGN(8); \ |
146 | VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ | |
bed1ffca FW |
147 | *(__syscalls_metadata) \ |
148 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; | |
149 | #else | |
150 | #define TRACE_SYSCALLS() | |
151 | #endif | |
152 | ||
aab94339 | 153 | |
06309288 RH |
154 | #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) |
155 | #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) | |
156 | #define OF_TABLE(cfg, name) __OF_TABLE(config_enabled(cfg), name) | |
157 | #define _OF_TABLE_0(name) | |
158 | #define _OF_TABLE_1(name) \ | |
f6e916b8 | 159 | . = ALIGN(8); \ |
06309288 RH |
160 | VMLINUX_SYMBOL(__##name##_of_table) = .; \ |
161 | *(__##name##_of_table) \ | |
162 | *(__##name##_of_table_end) | |
163 | ||
164 | #define CLKSRC_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, clksrc) | |
165 | #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) | |
166 | #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) | |
1cd076bf | 167 | #define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu) |
06309288 RH |
168 | #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) |
169 | #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) | |
b0b6abd3 | 170 | #define EARLYCON_OF_TABLES() OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon) |
6c3ff8b1 | 171 | |
aab94339 DB |
172 | #define KERNEL_DTB() \ |
173 | STRUCT_ALIGN(); \ | |
174 | VMLINUX_SYMBOL(__dtb_start) = .; \ | |
175 | *(.dtb.init.rodata) \ | |
176 | VMLINUX_SYMBOL(__dtb_end) = .; | |
177 | ||
ca967258 SR |
178 | /* .data section */ |
179 | #define DATA_DATA \ | |
0e0d314e | 180 | *(.data) \ |
312b1485 | 181 | *(.ref.data) \ |
d356c0b6 | 182 | *(.data..shared_aligned) /* percpu related */ \ |
eb8f6890 SR |
183 | MEM_KEEP(init.data) \ |
184 | MEM_KEEP(exit.data) \ | |
7ccaba53 | 185 | *(.data.unlikely) \ |
65498646 | 186 | STRUCT_ALIGN(); \ |
97e1c18e | 187 | *(__tracepoints) \ |
e9d376f0 | 188 | /* implement dynamic printk debug */ \ |
d430d3d7 JB |
189 | . = ALIGN(8); \ |
190 | VMLINUX_SYMBOL(__start___jump_table) = .; \ | |
191 | *(__jump_table) \ | |
192 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ | |
e9d376f0 JB |
193 | . = ALIGN(8); \ |
194 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
195 | *(__verbose) \ | |
196 | VMLINUX_SYMBOL(__stop___verbose) = .; \ | |
2bcd521a | 197 | LIKELY_PROFILE() \ |
b77e38aa | 198 | BRANCH_PROFILE() \ |
102c9323 SRRH |
199 | TRACE_PRINTKS() \ |
200 | TRACEPOINT_STR() | |
ca967258 | 201 | |
ef53dae8 SR |
202 | /* |
203 | * Data section helpers | |
204 | */ | |
205 | #define NOSAVE_DATA \ | |
206 | . = ALIGN(PAGE_SIZE); \ | |
207 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 208 | *(.data..nosave) \ |
ef53dae8 SR |
209 | . = ALIGN(PAGE_SIZE); \ |
210 | VMLINUX_SYMBOL(__nosave_end) = .; | |
211 | ||
212 | #define PAGE_ALIGNED_DATA(page_align) \ | |
213 | . = ALIGN(page_align); \ | |
75b13483 | 214 | *(.data..page_aligned) |
ef53dae8 SR |
215 | |
216 | #define READ_MOSTLY_DATA(align) \ | |
217 | . = ALIGN(align); \ | |
8369744f SL |
218 | *(.data..read_mostly) \ |
219 | . = ALIGN(align); | |
ef53dae8 SR |
220 | |
221 | #define CACHELINE_ALIGNED_DATA(align) \ | |
222 | . = ALIGN(align); \ | |
4af57b78 | 223 | *(.data..cacheline_aligned) |
ef53dae8 | 224 | |
39a449d9 | 225 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 226 | . = ALIGN(align); \ |
2af7687f | 227 | *(.data..init_task) |
ef53dae8 SR |
228 | |
229 | /* | |
230 | * Read only Data | |
231 | */ | |
232 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 233 | . = ALIGN((align)); \ |
1da177e4 | 234 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 235 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 LT |
236 | *(.rodata) *(.rodata.*) \ |
237 | *(__vermagic) /* Kernel version magic */ \ | |
65498646 MD |
238 | . = ALIGN(8); \ |
239 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ | |
240 | *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ | |
241 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ | |
97e1c18e | 242 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
243 | } \ |
244 | \ | |
245 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
246 | *(.rodata1) \ | |
247 | } \ | |
248 | \ | |
6360b1fb JB |
249 | BUG_TABLE \ |
250 | \ | |
1da177e4 LT |
251 | /* PCI quirks */ \ |
252 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
253 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
254 | *(.pci_fixup_early) \ | |
255 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ | |
256 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
257 | *(.pci_fixup_header) \ | |
258 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ | |
259 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
260 | *(.pci_fixup_final) \ | |
261 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ | |
262 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
263 | *(.pci_fixup_enable) \ | |
264 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ | |
1597cacb AC |
265 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
266 | *(.pci_fixup_resume) \ | |
267 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ | |
e1a2a51e RW |
268 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
269 | *(.pci_fixup_resume_early) \ | |
270 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ | |
271 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
272 | *(.pci_fixup_suspend) \ | |
273 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ | |
7d2a01b8 AN |
274 | VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \ |
275 | *(.pci_fixup_suspend_late) \ | |
276 | VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \ | |
1da177e4 LT |
277 | } \ |
278 | \ | |
5658c769 DW |
279 | /* Built-in firmware blobs */ \ |
280 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
281 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
282 | *(.builtin_fw) \ | |
283 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ | |
284 | } \ | |
285 | \ | |
63687a52 JB |
286 | TRACEDATA \ |
287 | \ | |
1da177e4 LT |
288 | /* Kernel symbol table: Normal symbols */ \ |
289 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
290 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
f02e8a65 | 291 | *(SORT(___ksymtab+*)) \ |
1da177e4 LT |
292 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
293 | } \ | |
294 | \ | |
295 | /* Kernel symbol table: GPL-only symbols */ \ | |
296 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
297 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
f02e8a65 | 298 | *(SORT(___ksymtab_gpl+*)) \ |
1da177e4 LT |
299 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
300 | } \ | |
301 | \ | |
f71d20e9 AV |
302 | /* Kernel symbol table: Normal unused symbols */ \ |
303 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
304 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
f02e8a65 | 305 | *(SORT(___ksymtab_unused+*)) \ |
f71d20e9 AV |
306 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
307 | } \ | |
308 | \ | |
309 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
310 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
311 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
f02e8a65 | 312 | *(SORT(___ksymtab_unused_gpl+*)) \ |
f71d20e9 AV |
313 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
314 | } \ | |
315 | \ | |
9f28bb7e GKH |
316 | /* Kernel symbol table: GPL-future-only symbols */ \ |
317 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
318 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
f02e8a65 | 319 | *(SORT(___ksymtab_gpl_future+*)) \ |
9f28bb7e GKH |
320 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
321 | } \ | |
322 | \ | |
1da177e4 LT |
323 | /* Kernel symbol table: Normal symbols */ \ |
324 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
325 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
f02e8a65 | 326 | *(SORT(___kcrctab+*)) \ |
1da177e4 LT |
327 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
328 | } \ | |
329 | \ | |
330 | /* Kernel symbol table: GPL-only symbols */ \ | |
331 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
332 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
f02e8a65 | 333 | *(SORT(___kcrctab_gpl+*)) \ |
1da177e4 LT |
334 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
335 | } \ | |
336 | \ | |
f71d20e9 AV |
337 | /* Kernel symbol table: Normal unused symbols */ \ |
338 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
339 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
f02e8a65 | 340 | *(SORT(___kcrctab_unused+*)) \ |
f71d20e9 AV |
341 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
342 | } \ | |
343 | \ | |
344 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
345 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
346 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
f02e8a65 | 347 | *(SORT(___kcrctab_unused_gpl+*)) \ |
f71d20e9 AV |
348 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
349 | } \ | |
350 | \ | |
9f28bb7e GKH |
351 | /* Kernel symbol table: GPL-future-only symbols */ \ |
352 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
353 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
f02e8a65 | 354 | *(SORT(___kcrctab_gpl_future+*)) \ |
9f28bb7e GKH |
355 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
356 | } \ | |
357 | \ | |
1da177e4 LT |
358 | /* Kernel symbol table: strings */ \ |
359 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
360 | *(__ksymtab_strings) \ | |
361 | } \ | |
362 | \ | |
eb8f6890 SR |
363 | /* __*init sections */ \ |
364 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 365 | *(.ref.rodata) \ |
eb8f6890 SR |
366 | MEM_KEEP(init.rodata) \ |
367 | MEM_KEEP(exit.rodata) \ | |
368 | } \ | |
369 | \ | |
1da177e4 LT |
370 | /* Built-in module parameters. */ \ |
371 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
372 | VMLINUX_SYMBOL(__start___param) = .; \ | |
373 | *(__param) \ | |
374 | VMLINUX_SYMBOL(__stop___param) = .; \ | |
e94965ed DT |
375 | } \ |
376 | \ | |
377 | /* Built-in module versions. */ \ | |
378 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
379 | VMLINUX_SYMBOL(__start___modver) = .; \ | |
380 | *(__modver) \ | |
381 | VMLINUX_SYMBOL(__stop___modver) = .; \ | |
edeed305 | 382 | . = ALIGN((align)); \ |
6569580d | 383 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 384 | } \ |
4096b46f SR |
385 | . = ALIGN((align)); |
386 | ||
ef53dae8 | 387 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 388 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
389 | #define RODATA RO_DATA_SECTION(4096) |
390 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
391 | |
392 | #define SECURITY_INIT \ | |
60bad7fa | 393 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 LT |
394 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
395 | *(.security_initcall.init) \ | |
396 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ | |
397 | } | |
398 | ||
7664709b SR |
399 | /* .text section. Map to function alignment to avoid address changes |
400 | * during second ld run in second ld pass when generating System.map */ | |
401 | #define TEXT_TEXT \ | |
402 | ALIGN_FUNCTION(); \ | |
fb5e2b37 | 403 | *(.text.hot) \ |
0e0d314e | 404 | *(.text) \ |
312b1485 | 405 | *(.ref.text) \ |
eb8f6890 | 406 | MEM_KEEP(init.text) \ |
fb5e2b37 JB |
407 | MEM_KEEP(exit.text) \ |
408 | *(.text.unlikely) | |
eb8f6890 | 409 | |
7664709b | 410 | |
6d30e3a8 SR |
411 | /* sched.text is aling to function alignment to secure we have same |
412 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 413 | #define SCHED_TEXT \ |
6d30e3a8 | 414 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
415 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
416 | *(.sched.text) \ | |
417 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
418 | ||
6d30e3a8 SR |
419 | /* spinlock.text is aling to function alignment to secure we have same |
420 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 421 | #define LOCK_TEXT \ |
6d30e3a8 | 422 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
423 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
424 | *(.spinlock.text) \ | |
425 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 PP |
426 | |
427 | #define KPROBES_TEXT \ | |
428 | ALIGN_FUNCTION(); \ | |
429 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
430 | *(.kprobes.text) \ | |
431 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 432 | |
ea714547 JO |
433 | #define ENTRY_TEXT \ |
434 | ALIGN_FUNCTION(); \ | |
435 | VMLINUX_SYMBOL(__entry_text_start) = .; \ | |
436 | *(.entry.text) \ | |
437 | VMLINUX_SYMBOL(__entry_text_end) = .; | |
438 | ||
a0343e82 FW |
439 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
440 | #define IRQENTRY_TEXT \ | |
441 | ALIGN_FUNCTION(); \ | |
442 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
443 | *(.irqentry.text) \ | |
444 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
445 | #else | |
446 | #define IRQENTRY_TEXT | |
447 | #endif | |
448 | ||
37c514e3 | 449 | /* Section used for early init (in .S files) */ |
7923f90f | 450 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 451 | |
7923f90f | 452 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
453 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
454 | HEAD_TEXT \ | |
455 | } | |
456 | ||
457 | /* | |
458 | * Exception table | |
459 | */ | |
460 | #define EXCEPTION_TABLE(align) \ | |
461 | . = ALIGN(align); \ | |
462 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
463 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
464 | *(__ex_table) \ | |
465 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ | |
466 | } | |
467 | ||
468 | /* | |
469 | * Init task | |
470 | */ | |
39a449d9 | 471 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 472 | . = ALIGN(align); \ |
da5e37ef | 473 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 474 | INIT_TASK_DATA(align) \ |
ef53dae8 | 475 | } |
37c514e3 | 476 | |
b99b87f7 | 477 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
478 | #define KERNEL_CTORS() . = ALIGN(8); \ |
479 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
b99b87f7 | 480 | *(.ctors) \ |
9ddf8252 | 481 | *(SORT(.init_array.*)) \ |
eb3057df | 482 | *(.init_array) \ |
b99b87f7 PO |
483 | VMLINUX_SYMBOL(__ctors_end) = .; |
484 | #else | |
485 | #define KERNEL_CTORS() | |
486 | #endif | |
487 | ||
01ba2bdc | 488 | /* init and exit section handling */ |
eb8f6890 SR |
489 | #define INIT_DATA \ |
490 | *(.init.data) \ | |
eb8f6890 | 491 | MEM_DISCARD(init.data) \ |
b99b87f7 | 492 | KERNEL_CTORS() \ |
4b3b4c5e | 493 | MCOUNT_REC() \ |
9fd49328 | 494 | *(.init.rodata) \ |
e4a9ea5e | 495 | FTRACE_EVENTS() \ |
3d56e331 | 496 | TRACE_SYSCALLS() \ |
376e2424 | 497 | KPROBE_BLACKLIST() \ |
aab94339 | 498 | MEM_DISCARD(init.rodata) \ |
f2f6c255 | 499 | CLK_OF_TABLES() \ |
f618c470 | 500 | RESERVEDMEM_OF_TABLES() \ |
ae278a93 | 501 | CLKSRC_OF_TABLES() \ |
1cd076bf | 502 | IOMMU_OF_TABLES() \ |
6c3ff8b1 | 503 | CPU_METHOD_OF_TABLES() \ |
f6e916b8 | 504 | KERNEL_DTB() \ |
b0b6abd3 RH |
505 | IRQCHIP_OF_MATCH_TABLE() \ |
506 | EARLYCON_OF_TABLES() | |
eb8f6890 SR |
507 | |
508 | #define INIT_TEXT \ | |
509 | *(.init.text) \ | |
eb8f6890 SR |
510 | MEM_DISCARD(init.text) |
511 | ||
512 | #define EXIT_DATA \ | |
513 | *(.exit.data) \ | |
eb8f6890 SR |
514 | MEM_DISCARD(exit.data) \ |
515 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 516 | |
eb8f6890 SR |
517 | #define EXIT_TEXT \ |
518 | *(.exit.text) \ | |
eb8f6890 | 519 | MEM_DISCARD(exit.text) |
01ba2bdc | 520 | |
7923f90f SR |
521 | #define EXIT_CALL \ |
522 | *(.exitcall.exit) | |
523 | ||
ef53dae8 SR |
524 | /* |
525 | * bss (Block Started by Symbol) - uninitialized data | |
526 | * zeroed during startup | |
527 | */ | |
04e448d9 TA |
528 | #define SBSS(sbss_align) \ |
529 | . = ALIGN(sbss_align); \ | |
ef53dae8 SR |
530 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
531 | *(.sbss) \ | |
532 | *(.scommon) \ | |
533 | } | |
534 | ||
c87728ca DD |
535 | /* |
536 | * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra | |
537 | * sections to the front of bss. | |
538 | */ | |
539 | #ifndef BSS_FIRST_SECTIONS | |
540 | #define BSS_FIRST_SECTIONS | |
541 | #endif | |
542 | ||
ef53dae8 SR |
543 | #define BSS(bss_align) \ |
544 | . = ALIGN(bss_align); \ | |
545 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
c87728ca | 546 | BSS_FIRST_SECTIONS \ |
7c74df07 | 547 | *(.bss..page_aligned) \ |
ef53dae8 SR |
548 | *(.dynbss) \ |
549 | *(.bss) \ | |
550 | *(COMMON) \ | |
ef53dae8 SR |
551 | } |
552 | ||
553 | /* | |
554 | * DWARF debug sections. | |
555 | * Symbols in the DWARF debugging sections are relative to | |
556 | * the beginning of the section so we begin them at 0. | |
557 | */ | |
a7d0c210 PBG |
558 | #define DWARF_DEBUG \ |
559 | /* DWARF 1 */ \ | |
560 | .debug 0 : { *(.debug) } \ | |
561 | .line 0 : { *(.line) } \ | |
562 | /* GNU DWARF 1 extensions */ \ | |
563 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
564 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
565 | /* DWARF 1.1 and DWARF 2 */ \ | |
566 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
567 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
568 | /* DWARF 2 */ \ | |
569 | .debug_info 0 : { *(.debug_info \ | |
570 | .gnu.linkonce.wi.*) } \ | |
571 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
572 | .debug_line 0 : { *(.debug_line) } \ | |
573 | .debug_frame 0 : { *(.debug_frame) } \ | |
574 | .debug_str 0 : { *(.debug_str) } \ | |
575 | .debug_loc 0 : { *(.debug_loc) } \ | |
576 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
577 | /* SGI/MIPS DWARF 2 extensions */ \ | |
578 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
579 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
580 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
581 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
582 | ||
583 | /* Stabs debugging sections. */ | |
584 | #define STABS_DEBUG \ | |
585 | .stab 0 : { *(.stab) } \ | |
586 | .stabstr 0 : { *(.stabstr) } \ | |
587 | .stab.excl 0 : { *(.stab.excl) } \ | |
588 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
589 | .stab.index 0 : { *(.stab.index) } \ | |
590 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
591 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 592 | |
6360b1fb | 593 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
594 | #define BUG_TABLE \ |
595 | . = ALIGN(8); \ | |
596 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 597 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
7664c5a1 | 598 | *(__bug_table) \ |
c6de0026 | 599 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 600 | } |
6360b1fb JB |
601 | #else |
602 | #define BUG_TABLE | |
603 | #endif | |
7664c5a1 | 604 | |
63687a52 JB |
605 | #ifdef CONFIG_PM_TRACE |
606 | #define TRACEDATA \ | |
607 | . = ALIGN(4); \ | |
608 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 609 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
63687a52 | 610 | *(.tracedata) \ |
c6de0026 | 611 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
612 | } |
613 | #else | |
614 | #define TRACEDATA | |
615 | #endif | |
616 | ||
9c9b8b38 | 617 | #define NOTES \ |
cbe87121 RM |
618 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
619 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
620 | *(.note.*) \ | |
621 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
622 | } | |
61ce1efe | 623 | |
ef53dae8 SR |
624 | #define INIT_SETUP(initsetup_align) \ |
625 | . = ALIGN(initsetup_align); \ | |
626 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
627 | *(.init.setup) \ | |
628 | VMLINUX_SYMBOL(__setup_end) = .; | |
629 | ||
026cee00 PM |
630 | #define INIT_CALLS_LEVEL(level) \ |
631 | VMLINUX_SYMBOL(__initcall##level##_start) = .; \ | |
632 | *(.initcall##level##.init) \ | |
633 | *(.initcall##level##s.init) \ | |
61ce1efe | 634 | |
ef53dae8 SR |
635 | #define INIT_CALLS \ |
636 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
026cee00 PM |
637 | *(.initcallearly.init) \ |
638 | INIT_CALLS_LEVEL(0) \ | |
639 | INIT_CALLS_LEVEL(1) \ | |
640 | INIT_CALLS_LEVEL(2) \ | |
641 | INIT_CALLS_LEVEL(3) \ | |
642 | INIT_CALLS_LEVEL(4) \ | |
643 | INIT_CALLS_LEVEL(5) \ | |
644 | INIT_CALLS_LEVEL(rootfs) \ | |
645 | INIT_CALLS_LEVEL(6) \ | |
646 | INIT_CALLS_LEVEL(7) \ | |
ef53dae8 SR |
647 | VMLINUX_SYMBOL(__initcall_end) = .; |
648 | ||
649 | #define CON_INITCALL \ | |
650 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
651 | *(.con_initcall.init) \ | |
652 | VMLINUX_SYMBOL(__con_initcall_end) = .; | |
653 | ||
654 | #define SECURITY_INITCALL \ | |
655 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
656 | *(.security_initcall.init) \ | |
657 | VMLINUX_SYMBOL(__security_initcall_end) = .; | |
658 | ||
659 | #ifdef CONFIG_BLK_DEV_INITRD | |
660 | #define INIT_RAM_FS \ | |
d8826262 | 661 | . = ALIGN(4); \ |
ef53dae8 SR |
662 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
663 | *(.init.ramfs) \ | |
ffe8018c HB |
664 | . = ALIGN(8); \ |
665 | *(.init.ramfs.info) | |
ef53dae8 | 666 | #else |
eadfe219 | 667 | #define INIT_RAM_FS |
ef53dae8 SR |
668 | #endif |
669 | ||
023bf6f1 TH |
670 | /* |
671 | * Default discarded sections. | |
672 | * | |
673 | * Some archs want to discard exit text/data at runtime rather than | |
674 | * link time due to cross-section references such as alt instructions, | |
675 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
676 | * section definitions so that such archs put those in earlier section | |
677 | * definitions. | |
678 | */ | |
405d967d TH |
679 | #define DISCARDS \ |
680 | /DISCARD/ : { \ | |
681 | EXIT_TEXT \ | |
682 | EXIT_DATA \ | |
023bf6f1 | 683 | EXIT_CALL \ |
405d967d | 684 | *(.discard) \ |
c7f52cdc | 685 | *(.discard.*) \ |
405d967d TH |
686 | } |
687 | ||
6ea0c34d MF |
688 | /** |
689 | * PERCPU_INPUT - the percpu input sections | |
690 | * @cacheline: cacheline size | |
691 | * | |
692 | * The core percpu section names and core symbols which do not rely | |
693 | * directly upon load addresses. | |
694 | * | |
695 | * @cacheline is used to align subsections to avoid false cacheline | |
696 | * sharing between subsections for different purposes. | |
697 | */ | |
698 | #define PERCPU_INPUT(cacheline) \ | |
699 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
700 | *(.data..percpu..first) \ | |
701 | . = ALIGN(PAGE_SIZE); \ | |
702 | *(.data..percpu..page_aligned) \ | |
703 | . = ALIGN(cacheline); \ | |
330d2822 | 704 | *(.data..percpu..read_mostly) \ |
6ea0c34d MF |
705 | . = ALIGN(cacheline); \ |
706 | *(.data..percpu) \ | |
707 | *(.data..percpu..shared_aligned) \ | |
708 | VMLINUX_SYMBOL(__per_cpu_end) = .; | |
709 | ||
3e5d8f97 | 710 | /** |
6b7c38d5 | 711 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 712 | * @cacheline: cacheline size |
3e5d8f97 TH |
713 | * @vaddr: explicit base address (optional) |
714 | * @phdr: destination PHDR (optional) | |
715 | * | |
19df0c2f TH |
716 | * Macro which expands to output section for percpu area. |
717 | * | |
718 | * @cacheline is used to align subsections to avoid false cacheline | |
719 | * sharing between subsections for different purposes. | |
720 | * | |
721 | * If @vaddr is not blank, it specifies explicit base address and all | |
722 | * percpu symbols will be offset from the given address. If blank, | |
723 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
724 | * |
725 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
726 | * output PHDR is sticky. If @phdr is specified, the next output | |
727 | * section in the linker script will go there too. @phdr should have | |
728 | * a leading colon. | |
729 | * | |
3ac6cffe TH |
730 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
731 | * If there is no need to put the percpu section at a predetermined | |
0415b00d | 732 | * address, use PERCPU_SECTION. |
3e5d8f97 | 733 | */ |
19df0c2f | 734 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
dba3d36b | 735 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 736 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 | 737 | - LOAD_OFFSET) { \ |
6ea0c34d | 738 | PERCPU_INPUT(cacheline) \ |
6b7c38d5 | 739 | } phdr \ |
3d9a854c | 740 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
741 | |
742 | /** | |
0415b00d | 743 | * PERCPU_SECTION - define output section for percpu area, simple version |
19df0c2f | 744 | * @cacheline: cacheline size |
3e5d8f97 | 745 | * |
0415b00d TH |
746 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
747 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 748 | * __per_cpu_start will be identical. |
3ac6cffe | 749 | * |
0415b00d | 750 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
19df0c2f TH |
751 | * except that __per_cpu_load is defined as a relative symbol against |
752 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 753 | */ |
0415b00d TH |
754 | #define PERCPU_SECTION(cacheline) \ |
755 | . = ALIGN(PAGE_SIZE); \ | |
3d9a854c | 756 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe | 757 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
6ea0c34d | 758 | PERCPU_INPUT(cacheline) \ |
3ac6cffe | 759 | } |
ef53dae8 SR |
760 | |
761 | ||
762 | /* | |
763 | * Definition of the high level *_SECTION macros | |
764 | * They will fit only a subset of the architectures | |
765 | */ | |
766 | ||
767 | ||
768 | /* | |
769 | * Writeable data. | |
770 | * All sections are combined in a single .data section. | |
771 | * The sections following CONSTRUCTORS are arranged so their | |
772 | * typical alignment matches. | |
773 | * A cacheline is typical/always less than a PAGE_SIZE so | |
774 | * the sections that has this restriction (or similar) | |
775 | * is located before the ones requiring PAGE_SIZE alignment. | |
776 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
25985edc | 777 | * matches the requirement of PAGE_ALIGNED_DATA. |
ef53dae8 | 778 | * |
7923f90f | 779 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 780 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
781 | . = ALIGN(PAGE_SIZE); \ |
782 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 783 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
784 | NOSAVE_DATA \ |
785 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
786 | CACHELINE_ALIGNED_DATA(cacheline) \ |
787 | READ_MOSTLY_DATA(cacheline) \ | |
788 | DATA_DATA \ | |
789 | CONSTRUCTORS \ | |
ef53dae8 SR |
790 | } |
791 | ||
792 | #define INIT_TEXT_SECTION(inittext_align) \ | |
793 | . = ALIGN(inittext_align); \ | |
794 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
795 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
796 | INIT_TEXT \ | |
797 | VMLINUX_SYMBOL(_einittext) = .; \ | |
798 | } | |
799 | ||
800 | #define INIT_DATA_SECTION(initsetup_align) \ | |
801 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
802 | INIT_DATA \ | |
803 | INIT_SETUP(initsetup_align) \ | |
804 | INIT_CALLS \ | |
805 | CON_INITCALL \ | |
806 | SECURITY_INITCALL \ | |
807 | INIT_RAM_FS \ | |
808 | } | |
809 | ||
04e448d9 TA |
810 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
811 | . = ALIGN(sbss_align); \ | |
812 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
813 | SBSS(sbss_align) \ | |
ef53dae8 | 814 | BSS(bss_align) \ |
04e448d9 TA |
815 | . = ALIGN(stop_align); \ |
816 | VMLINUX_SYMBOL(__bss_stop) = .; |